dbcve.org
macOSOperating system · Apple

CVE-2025-24239

MEDIUM · 6.5 CVSS v3.1 Published 2025-03-31
Fix available
A fix is available. Upgrade to 15.4 or later.
See remediation →
71/100
Remediation priority · Elevated
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A downgrade issue was addressed with additional code-signing restrictions. This issue is fixed in macOS Sequoia 15.4. An app may be able to access protected user data.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

This is a code-signing bypass vulnerability in macOS where a downgrade attack allowed apps to circumvent code-signing restrictions and access protected user data. The fix in macOS Sequoia 15.4 adds additional code-signing restrictions to prevent this downgrade attack vector.

MitigationUpdate to macOS Sequoia 15.4 or later. Organizations should verify that all Macs are patched and review any enterprise code-signing policies to ensure they enforce the updated restrictions.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
macOSOperating system
Affected:< 15.4

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Determine installed macOS version
    Run 'sw_vers -productVersion' in Terminal, or open System Settings > General > About to view the macOS version number
    Affected if The reported version is below 15.4 (for example, 15.3.x, 14.x, 13.x, etc.)

The environment is affected if the installed macOS version is earlier than 15.4, as those versions lack the additional code-signing restrictions that block the downgrade attack vector.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 15.4 or later
Fixed in 15.4
Interim mitigation

Update to macOS Sequoia 15.4 or later. Organizations should verify that all Macs are patched and review any enterprise code-signing policies to ensure they enforce the updated restrictions.

Recommended fix High confidence

macOS Sequoia 15.4

  1. Back up your Mac using Time Machine or another backup solution before proceeding
  2. Ensure your Mac is connected to power during the update process
  3. Open System Settings on your Mac
  4. Navigate to General > Software Update
  5. Wait for macOS to check for available updates
  6. If macOS Sequoia 15.4 is listed as available, click Update Now or Download and Install
  7. Follow the on-screen prompts to complete the update
  8. Restart your Mac when prompted to complete the installation
Caveat Standard macOS upgrade considerations apply - verify critical applications are compatible with macOS Sequoia before upgrading

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in macOS Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
7.0 hours of engineering $1,240
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,984.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-24239 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data